问题标题：
Doyouknowwhatsubjectstheymajorinwhiletheywereatcollege？___．
问题描述：
Do you know what subjects they major in while they were at college？___．
方忠祥回答：
答案：major改为majored
此处在what引导的宾语从句中作谓语，根据句中的时间状语"while they were at college"可知，这里询问的是过去他们在上大学时主修的科目，应使用一般过去时；故用majored．
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